Lubricator.



Patented Mar. 4, i902.

B. T. MGCANNA V&. T. A. DELANEY. LUBRICA'TB.

(Application led Nov. 15, 1901.)

li-lllllllllllll Nrrnn STATES 'PATENT OFFICE.

BENJAMIN T. MCCANNA' AND THOMAS A. DELANEY, OF CHICAGO, ILLINOIS, 'ASSIGNORS TO HILLS-MCCANNA COMPANY, OF CHICAGO, ILLINOIS.

LUBRICATO R.

SPECIFICATION forming part of Letters Patent No. 694,406, dated March 4, 1902.

Application iiled November l5, 1901. Serial No. 82,468l (No model.)

To all whom it may concern.-

Beit known that we, BENJAMIN T. MCCANNA and THOMAS A. DELANEY, of Chicago,1llin0is, have invented certain new and useful Improvements in Lubricators, whereof the following is a specification.

Our invention is intended more particularly to provide a sight-feed for force-feed lubricators,.and more especially for the force-feed lubricators on which we obtained Letters Patent No. 659,166, dated October 2, 1900.

Our invention may be best understood by reference to the accompanying drawing and the subjoined description thereof, in which we have set it forth in what we consider its best form.

In the drawing, Figure 1 is a view showing a pump of-our above-mentioned fprce-feed lubricator in elevation and the sight-feed device attached thereto and in section. Fig. 2 is a top view of the same` devices shown in Fig. 1. Fig. 3 is a longitudinal section of an-` other form of the sight-feed device.

In these figures, 1 is the pump, mounted on the oil-reservoir 2 and provided with a plunger 3, which is reciprocated by the yoke et, acting on the adjustable stops 5 and 6. This part of the device being fully shown in our former patent need not be further described here.

7 8 is the pipe through which the pump forces the lubricant to the part to be lubricated.

At any convenient point on the dischargepipe 7 8 we interpolate the sight-feed devices. In the form shown in Figs. 1 and 2 these consist of the following mechanisms: 9 is the body of the apparatus, provided with coup- 1S is a by-pass orifice through which oil may pass from one side to the other of the piston or plunger 12.

19 is a groove across the top of the plunger to prevent the contact of the plunger with the glass 14 from stopping the flow of the oil.

The operation of the apparatus is as follows: The pump 1 being a single-acting pump will force oil only on the inward stroke of its plunger 3. through pipe 7 and through passage 16 to the space immediately under the glass 14 and presses down the plunger 12 and passes on through orifice 18 and channel 17 and on through pipe 8 to the point to be lubricated. This pressing down of plunger 12 and the passage of the oil over the top of it wholly or partly obscures itv from sight as viewed through the glass 14. When, however, the oil ceases to flow from any cause whatever, the spring 13 forces the plunger 12 upward again into view, and this obscuration and reappearance of the plunger gives a visual indication to the attendant of the flow or non flow of the oil.

In the moditied form shown in Fig. 3 the plunger is substituted by a floating block 20,

. balanced on the rounded end of a spring-tube 2l, and the channel 16 isinside that tube. The oil by its passage through the tube 21 and the orice 18 in the floating block 20 forces the block down and obscures it, and when the flow ceases the resilience of the tube moves the block up into view again. The rounded connect-ion at 22 between the block and the tube is to permit the top of the block to conform to the surface of the glass.

It is of course to be understood that this On this stroke the oil passes apparatus may be modiledinv other ways than that shown without departing from our invention.

We claim'- 1. A sight-feed for a force-feed lubricator,

comprising in combination, an oil-duct, a transparent portion thereof, and a movable indicator contiguous to said transparent por- IOO maintain said plunger in its normal position, substantially as set forth.

4. A sight-feed comprising in combination, an oil-duct, a chamber in said duct, a glass Wall to said chamber, a plunger moving in said chamber, and a spring to press said plunger toward said glass Wall, substantially as zo set forth.

BENJAMIN T. MCCANNA. THOMAS A. DELANEY. Witnesses:

WM. S. BATES, RoBT. E. MILLS. 

